bms/Application/app/nv_storage.c

#include <string.h>
#include "nv_storage.h"
#include "bsp/AT24CXX.h"
#include "app/sox/soc.h"
#include "libs/logger.h"
#include "libs/shark_utils.h"

#if 0
static void backup_timer_hander(shark_timer_t *timer);
static void nv_save_soc_by_backup(int index);
#endif
static void nv_save_soc_task(shark_timer_t *timer);


#define SOC_ADDR 0
static shark_timer_t _save_backup_timer = {.handler = nv_save_soc_task};
#define SOC_SIZE (((sizeof(soc_t) + sizeof(uint16_t)) + 0xF)&(0xFFF0)) //需要16字节对齐
#define SN_ADDR (SOC_ADDR + (SOC_SIZE * 2))

static uint8_t soc_write_pending = 0;
static uint8_t soc_write_backup_index = 0;
static uint8_t soc_write_index = 0;
static uint8_t soc_data[(sizeof(soc_t) + sizeof(uint16_t))];

int nv_save_sn(uint8_t *sn, int len){
	sn_t sn_info;
	if (len > sizeof(sn_info.sn)){
		return -1;
	}
	memcpy(sn_info.sn, sn, len);
	sn_info.len = len;
	sn_info.crc = shark_crc16_update(0, (const u8 *)sn_info.sn, len);
	return AT24CXX_Write(SN_ADDR, (uint8_t *)&sn_info, sizeof(sn_info));
}

int nv_read_sn(uint8_t *sn, int len){
	sn_t sn_info;
	if (len < sizeof(sn_info.sn)){
		return -1;
	}

	if (AT24CXX_Read(SN_ADDR, (uint8_t *)&sn_info, sizeof(sn_info)) < 0) {
		return -1;
	}
	if (sn_info.len > sizeof(sn_info.sn)){
		return -1;
	}
	uint16_t crc = shark_crc16_update(0, (const u8 *)sn_info.sn, sn_info.len);
	if (crc != sn_info.crc){
		return -1;
	}
	memcpy(sn, sn_info.sn, sn_info.len);
	return sn_info.len;
}

/* soc 保存，拆分每次保存一个byte，确保e2rom写操作不会占用太长时间 */
void nv_save_soc(void){
#if 0	
	nv_save_soc_by_backup(0);
	shark_timer_post(&_save_backup_timer, 10);
#else
	if (soc_write_pending == 0){
		soc_write_pending = 1;
		memcpy(soc_data, (void *)get_soc(), sizeof(soc_t));
		soc_write_backup_index = 0;
		soc_write_index = 0;
		uint16_t crc16 = shark_crc16_update(0, (const u8 *)soc_data, sizeof(soc_t));
		shark_encode_u16(soc_data + sizeof(soc_t), crc16);
		shark_timer_post(&_save_backup_timer, 0);
	}
	
#endif
}

static void nv_save_soc_task(shark_timer_t *timer){
	if (soc_write_pending == 0) {
		return;
	}
	if (soc_write_index < sizeof(soc_data)){
		AT24CXX_Write(SOC_ADDR + SOC_SIZE * soc_write_backup_index + soc_write_index, soc_data + soc_write_index, 1);
		soc_write_index ++;
	}else {
		soc_write_index = 0;
		soc_write_backup_index ++;
		if (soc_write_backup_index == 2){
			soc_write_pending = 0;
			sys_debug("write soc to nv OK\n");
			return;
		}
	}
	shark_timer_post(&_save_backup_timer, 0);
}

#if 0
static void backup_timer_hander(shark_timer_t *timer){
	nv_save_soc_by_backup(1);
}
#endif

static void nv_save_soc_by_backup(int index){
	uint16_t nv_addr = SOC_ADDR + SOC_SIZE * index;
	soc_t *soc = get_soc();
	
	uint16_t crc16 = shark_crc16_update(0, (const u8 *)soc, sizeof(soc_t));
	AT24CXX_Write(nv_addr ,(uint8_t *)soc, sizeof(soc_t));
	AT24CXX_Write(nv_addr + sizeof(soc_t),(uint8_t *)&crc16, sizeof(crc16));
}


void nv_erase(void){
	uint8_t data = 0xFF;
	for (int i = 0; i < sizeof(soc_t) + sizeof(uint16_t); i++){
		AT24CXX_Write(SOC_ADDR + i, &data, 1);
	}
	for (int i = 0; i < sizeof(soc_t) + sizeof(uint16_t); i++){
		AT24CXX_Write(SOC_ADDR + SOC_SIZE + i, &data, 1);
	}	
}

int nv_restore_soc_by_backup(int index, soc_t *soc){
	uint16_t crc_nv;
	uint16_t nv_addr = SOC_ADDR + SOC_SIZE * index;
	
	AT24CXX_Read(nv_addr , (uint8_t *)soc, sizeof(soc_t));
	AT24CXX_Read(nv_addr + sizeof(soc_t), (uint8_t *)&crc_nv, sizeof(crc_nv));

	if (shark_crc16_update(0, (const u8 *)soc, sizeof(soc_t)) != crc_nv){
		return -1;
	}
	return 0;
}


int nv_restore_soc(void){
	soc_t soc0, soc1;
	int success0, success1;
	
	success0 = nv_restore_soc_by_backup(0, &soc0);
	success1 = nv_restore_soc_by_backup(1, &soc1);

	if (success0 == 0 || success1 == 0){
		if (success1 != 0){
			nv_save_soc_by_backup(1);
		}
		if (success0 != 0){
			nv_save_soc_by_backup(0);
		}
		if (success0 == 0){
			*get_soc() = soc0;
		}else if (success1 == 0){
			*get_soc() = soc1;
		}
	}	
	return ((success0 == 0) || (success1 == 0))?0:-1;
}